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5.6X69.32+138.64x0.05+69.32x4.3用简便算法?

题目详情
5.6X69.32+138.64x0.05+69.32x4.3用简便算法?
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答案和解析
5.6X69.32+138.64x0.05+69.32x4.3
=5.6×69.32+69.32×2×0.05+69.32×4.3
=69.32×(5.6+0.1+4.3)
=69.32×10
=693.2